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A packaging of the IntelliJ Community Edition ui-designer library. This is release number 1 of trunk branch 142.
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/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.intellij.uiDesigner;

import com.intellij.openapi.module.Module;
import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.*;
import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.psi.util.ClassUtil;
import com.intellij.psi.util.InheritanceUtil;
import com.intellij.psi.util.PropertyUtil;
import com.intellij.uiDesigner.lw.*;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import javax.swing.*;
import java.awt.*;
import java.util.HashMap;

/**
 * @author Anton Katilin
 * @author Vladimir Kondratyev
 */
public final class PsiPropertiesProvider implements PropertiesProvider {
  private final Module myModule;
  private final HashMap myCache;

  public PsiPropertiesProvider(@NotNull final Module module) {
    myModule = module;
    myCache = new HashMap();
  }

  @Nullable
  public HashMap getLwProperties(final String className) {
    if (myCache.containsKey(className)) {
      return myCache.get(className);
    }

    final PsiManager psiManager = PsiManager.getInstance(myModule.getProject());
    final GlobalSearchScope scope = GlobalSearchScope.moduleWithDependenciesAndLibrariesScope(myModule);
    final PsiClass aClass = JavaPsiFacade.getInstance(psiManager.getProject()).findClass(className, scope);
    if (aClass == null) {
      return null;
    }

    final HashMap result = new HashMap();

    final PsiMethod[] methods = aClass.getAllMethods();
    for (final PsiMethod method : methods) {
      // it's a setter candidate.. try to find getter

      if (!PropertyUtil.isSimplePropertySetter(method)) {
        continue;
      }
      final String name = PropertyUtil.getPropertyName(method);
      if (name == null) {
        throw new IllegalStateException();
      }
      final PsiMethod getter = PropertyUtil.findPropertyGetter(aClass, name, false, true);
      if (getter == null) {
        continue;
      }

      final PsiType type = getter.getReturnType();
      String propertyClassName =
        StringUtil.defaultIfEmpty(StringUtil.substringBefore(type.getCanonicalText(), "<"), type.getCanonicalText());

      LwIntrospectedProperty property = CompiledClassPropertiesProvider.propertyFromClassName(propertyClassName, name);
      if (property == null) {
        PsiClass propClass = JavaPsiFacade.getInstance(psiManager.getProject()).findClass(propertyClassName, scope);
        if (propClass == null) continue;
        if (propClass.isEnum()) {
          final String enumClassName = ClassUtil.getJVMClassName(propClass);
          final ClassLoader loader = LoaderFactory.getInstance(myModule.getProject()).getLoader(myModule);
          try {
            property = new LwIntroEnumProperty(name, loader.loadClass(enumClassName));
          }
          catch (ClassNotFoundException e) {
            continue;
          }
        }
        else {
          PsiClass componentClass = JavaPsiFacade.getInstance(psiManager.getProject()).findClass(Component.class.getName(), scope);
          PsiClass listModelClass = JavaPsiFacade.getInstance(psiManager.getProject()).findClass(ListModel.class.getName(), scope);
          if (componentClass != null && InheritanceUtil.isInheritorOrSelf(propClass, componentClass, true)) {
            property = new LwIntroComponentProperty(name, propertyClassName);
          }
          else if (componentClass != null && listModelClass != null && InheritanceUtil.isInheritorOrSelf(propClass, listModelClass, true)) {
            property = new LwIntroListModelProperty(name, propertyClassName);
          }
          else {
            // type is not supported
            continue;
          }
        }
      }

      result.put(name, property);
    }

    myCache.put(className, result);
    return result;
  }
}